package com.example.yls.demoa;

import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
private ListView mylistView;
private SwipeRefreshLayout swipeRefreshLayout;
private ArrayList<String> arrayList=new ArrayList<>();
private ArrayAdapter<String> arrayAdapter;
private Handler handler;
private  final int  SEND_REFRENSH =1001;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        initView();

        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        arrayList.clear();
                        try {
                            Thread.sleep(3000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                        for(int i=0;i<10;i++){
                            arrayList.add("下拉刷新+"+i);

                        }
                        handler.sendEmptyMessage(SEND_REFRENSH);

                    }
                }).start();
            }
        });



    }

    private void initView() {
            swipeRefreshLayout=findViewById(R.id.swipeLayout);
            mylistView=findViewById(R.id.mylist);
            arrayAdapter=new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_expandable_list_item_1,arrayList);
          mylistView.setAdapter(arrayAdapter);
         handler=new Handler(new Handler.Callback() {
             @Override
             public boolean handleMessage(Message message) {

                 if (message.what==SEND_REFRENSH){
                     arrayAdapter.notifyDataSetChanged();
                     swipeRefreshLayout.setRefreshing(false);
                 }


                 return false;
             }
         });



    }
}
